{"id":"CVE-2026-109425","summary":"Tink-go 2.8.0 Keyset Validation Bypass via NewHandleWithNoSecrets","details":"Tink-go (tink-crypto/tink-go) through 2.8.0 contains an input-validation vulnerability where keyset.NewHandleWithNoSecrets() and ReadWithNoSecrets() skip the structural Validate() step before constructing a keyset.Handle, allowing malformed public or no-secret keysets that violate Tink's keyset invariants to be accepted. Attackers can supply a malformed keyset, such as one with an enabled public key lacking a valid primary key or a DESTROYED key with no KeyData, causing inconsistent downstream validation where functions like jwt.JWKSetFromPublicKeysetHandle() process the invalid handle and produce a JWK set, potentially misleading applications that rely on successful handle construction as proof of keyset integrity.","modified":"2026-10-15T02:31:05.270095510Z","published":"2026-10-12T19:55:37.215Z","database_specific":{"cwe_ids":["CWE-1286"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109425.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109425.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109425"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/tink-go-keyset-validation-bypass-via-newhandlewithnosecrets"},{"type":"PACKAGE","url":"https://github.com/tink-crypto/tink-go"},{"type":"EVIDENCE","url":"https://github.com/tink-crypto/tink-go/issues/68"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/tink-crypto/tink-go","events":[{"introduced":"e4efe8dadfb70cc4bad49c2f5a774e6783e0a251"},{"fixed":"ea8714348155f8b04002b633a790f41d58539672"}],"database_specific":{"extracted_events":[{"introduced":"2.0.0"},{"last_affected":"2.8.0"},{"introduced":"0"},{"fixed":"2.8.0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["v2.7.0","v2.6.0","v2.5.0","v2.4.0","v2.3.0","v2.2.0","v2.1.0","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109425.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"}]}